Pass user session type to extension feature checks

extensions/common/features/feature_session_type.h

Index: extensions/common/features/feature_session_type.h
diff --git a/extensions/common/features/feature_session_type.h b/extensions/common/features/feature_session_type.h
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index 0000000000000000000000000000000000000000..bd202ceb6cf28b01613c81d0769753b7728348b9
--- /dev/null
+++ b/extensions/common/features/feature_session_type.h
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+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef EXTENSIONS_COMMON_FEATURES_FEATURE_SESSION_TYPE_H_
+#define EXTENSIONS_COMMON_FEATURES_FEATURE_SESSION_TYPE_H_
+
+#include <memory>
+
+#include "base/auto_reset.h"
+
+namespace extensions {
+
+// Classes of session types to which features can be restricted in feature
+// files. The session type describes session based on the type of user that is
+// active in the current session.
+enum class FeatureSessionType {
+  // Initial session state - before a user logs in.
+  INITIAL = 0,
+  // Represents a session type that cannot be used with feature's session types
+  // property.
+  UNKNOWN = 1,
+  // Regular user session.
+  REGULAR = 2,
+  // Kiosk app session.
+  KIOSK = 3,
+  // Helper for determining max enum value - not used as a real type.
+  LAST = KIOSK
+};
+
+// Gets the current session type as seen by the Feature system.
+FeatureSessionType GetCurrentFeatureSessionType();
+
+// Sets the current session type as seen by the Feature system. In the browser
+// process this should be extensions::util::GetCurrentSessionType(), and in
+// the renderer this will need to come from an IPC.
+void SetCurrentFeatureSessionType(FeatureSessionType session_type);
+
+// Scoped session type setter. Use for tests.
+std::unique_ptr<base::AutoReset<FeatureSessionType>>
+ScopedCurrentFeatureSessionType(FeatureSessionType type);
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_FEATURES_FEATURE_SESSION_TYPE_H_